Stirring element having segmented configuration, for circulating wastewater in basin, and apparatus

Abstract

A device for circulating wastewater is received in a tank, in which a conical or hyperboloid-like stirring body is mounted on a vertical stirring shaft, wherein the stirring body is composed from a plurality of segments produced from metal along radially extending joining zones.

The invention claimed is: 
     
       1. A stirring body for circulating wastewater received in a tank, wherein the stirring body has a conical or hyperboloid shape and a central connector piece for connection to a stirring shaft,
 the stirring body is formed from a plurality of segments, which is produced from metal and which is assembled along joining zones extending from the stirring shaft to a peripheral edge of the stirring body, and 
 bent sheet metal portions of two adjacent segments form a transport rib in a connected state. 
 
     
     
       2. The stirring body according to  claim 1 , wherein the joining zones extend at least in part parallel or in a slanting manner relative to a radial direction. 
     
     
       3. The stirring body according to  claim 1 , wherein the joining zones are formed from a plurality of straight portions, each of the plurality of straight portions being interconnected to adjacent straight portion via an angled deflection. 
     
     
       4. The stirring body according to  claim 3 , wherein an angle enclosed by the straight portions adjacent to each other is 130° to 165°. 
     
     
       5. The stirring body according to  claim 1 , wherein the segments are produced from a sheet metal produced from high-grade steel having a thickness from 0.5 to 15 mm. 
     
     
       6. The stirring body according to  claim 1 , wherein the segments have a form similar to a segment of a circle in a plan view. 
     
     
       7. The stirring body according to  claim 1 , wherein the segments are structurally identical. 
     
     
       8. The stirring body according to  claim 1 , further comprising shearing ribs mounted on a peripheral edge portion of the segments forming a portion of the peripheral edge. 
     
     
       9. The stirring body according to  claim 1 , wherein the transport rib extends from an upper side of each segment, facing towards the stirring shaft. 
     
     
       10. The stirring body according to  claim 1 , wherein a radially inner end of each segment has an angled connector portion provided with an aperture. 
     
     
       11. A device for circulating wastewater received in a tank, wherein the stirring body according to  claim 1  is mounted on the stirring shaft extending from a drive arrangement. 
     
     
       12. A stirring body for circulating wastewater received in a tank,
 wherein the stirring body has a conical or hyperboloid shape and a central connector piece for connection to a stirring shaft, 
 the stirring body is formed from a plurality of segments, which is produced from metal and which is assembled along joining zones extending from the stirring shaft to a peripheral edge of the stirring body, and 
 each segment has bending lines extending in the radial direction. 
 
     
     
       13. A stirring body for circulating wastewater received in a tank,
 wherein the stirring body has a conical or hyperboloid shape and a central connector piece for connection to a stirring shaft, 
 the stirring body is formed from a plurality of segments, which is produced from metal and which is assembled along joining zones extending from the stirring shaft to a peripheral edge of the stirring body, and 
 the joining zones are formed by sheet metal portions bent towards an upper side of the segments. 
 
     
     
       14. A stirring body for circulating wastewater received in a tank, wherein the stirring body has a conical or hyperboloid shape and a central connector piece for connection to a stirring shaft,
 the stirring body is formed from a plurality of segments, which is produced from metal and which is assembled along joining zones extending from the stirring shaft to a peripheral edge of the stirring body, and 
 shearing ribs and/or transport ribs are formed from a sheet metal produced from high-grade steel and are connected to the respective segments by at least one spot joint. 
 
     
     
       15. A stirring body for circulating wastewater received in a tank, wherein the stirring body has a conical or hyperboloid shape and a central connector piece for connection to a stirring shaft,
 the stirring body is formed from a plurality of segments, which is produced from metal and which is assembled along joining zones extending from the stirring shaft to a peripheral edge of the stirring body, and 
 each segment is formed from a plurality of sub-segments, which is assembled along further joining zones extending approximately concentrically relative to the stirring shaft. 
 
     
     
       16. The stirring body according to  claim 15 , wherein the segments or the sub-segments are interconnected by rivet or spot-welding joints.